Finding the Fourth Proportional to 142,449.21, 196,387.55 and 91,373.27

Step by Step Solution

1. Step 1: Write the proportion equation
   142,449.21 : 196,387.55 = 91,373.27 : x
2. Step 2: Convert to fraction form
   142,449.21/196,387.55 = 91,373.27/x
3. Step 3: Cross multiply
   142,449.21x = 196,387.55 × 91,373.27
4. Step 4: Simplify right side
   142,449.21x = 17,944,571,191.98
5. Step 5: Solve for x
   x = 17,944,571,191.98/142,449.21
6. Step 6: Final answer
   x = 125,971.71